Kinesiology Muscle Quiz 3

Deltoid Origin

Lateral 1/3 of the clavicle (anterior)

Deltoid Origin

Acromion of the scapula (middle)

Deltoid Origin

Lower lip of crest of the spine of the scapula (posterior)

Deltoid Insertion

Deltoid tuberosity of the humerus

Deltoid Action

Abduction of humerus (middle)

Deltoid Action

Flexion, internal rotation, and horizontal adduction of humerus (anterior)

Deltoid Action

Hyperextension ,external rotation, and horizontal abduction of the humerus (posterior)

Deltoid Innervation

Axillary Nerve, C5, C6

Pectoralis Major Origin

Medial 1/2 of the front of the clavicle

Pectoralis Major Origin

Anterior surface of the sternum, upper 6 costal cartilages, and aponeurosis of the external oblique muscle

Pectoralis Major Insertion

Lateral lip of the bicipital groove of the humerus Crest of the greater tubercle of the humerus

Pectoralis Major Action

Horizontal adduction of the humerus

Pectoralis Major Action

Internal rotation of the humerus

Pectoralis Major Action

Flexion of humerus

Pectoralis Major Innervation

Medial and Lateral Pectoral Nerves, C5, C6, C7, C8, T1

Teres Major Origin

Dorsal Surface of the scapula near its inferior angle

Teres Major Insertion

Medial lip of the bicipital groove of the humerus Crest of the lesser tubercle of humerus

Teres Major Action

Internal rotation of the humerus

Teres Major Action

Extension and hyperextension of humerus

Teres Major Action

Adduction

Teres Major Innervation

Lower Subscapular Nerve, C5, C6